JP4306382B2 - Pulse wave measuring device - Google Patents

Description

  The present invention relates to a pressure-type pulse wave measuring device that measures a pulse wave by pressing a pressure-sensitive part against a living body, and more specifically, a pressure-type pulse wave measurement provided with a fixed base that fixes the posture of the living body. Relates to the device.

  2. Description of the Related Art In general, a pressure type pressure measuring device that measures a contact pressure with an object to be measured by pressing the object to be measured is known. There is a pulse wave measuring apparatus as an apparatus to which this pressing type pressure measuring apparatus is applied. The pulse wave measuring device is a device that measures a pulse wave by pressing a substrate having pressure-sensitive means against the body surface in order to measure a pulse wave generated in an artery located relatively shallower than the skin of a living body. . Measuring the pulse wave of a subject using such a pulse wave measuring device is very important for knowing the health condition of the subject.

  In this press-type pulse wave measuring device, a semiconductor pressure detecting device using a strain gauge or a diaphragm is generally used as a pressure sensitive means. In this case, the pressure sensing unit is configured such that pressure sensing means for detecting a pulse wave is located on the surface of the sensor unit attached to the living body.

  In the pulse wave measuring apparatus having the above configuration, the sensor unit needs to be attached to the living body in a state where the sensor unit is pressed and biased at an appropriate position with an appropriate pressing force. Generally, a fastening band is used for mounting the sensor unit on a living body. For this reason, it is necessary to attach the tightening band to the living body with an appropriate tightening force that does not cause pain to the subject.

  As a pulse wave measuring device that realizes this appropriate tightening force, there is a pulse wave measuring device disclosed in Japanese Patent Laid-Open No. 3-1446027 (Patent Document 1). Hereinafter, the pulse wave measuring device disclosed in the above publication will be described with reference to the drawings.

  FIG. 15 is a longitudinal sectional view of the pulse wave measuring device disclosed in the above publication. The pulse wave measurement device shown in FIG. 15 is a pulse wave measurement device that employs a wrist as a measurement site for measuring a subject's pulse wave.

  As shown in FIG. 15, the pulse wave measuring device is attached to the sensor unit 140 via a sensor unit 140 having a pressure-sensitive portion, a locking portion 162 provided adjacent to the sensor unit 140, and a mounting bracket 164. The tightening band 130 and the tension adjusting means 166 attached to the other end of the tightening band 130 are mainly provided. Fixing means (not shown) such as a hook-and-loop fastener is provided on the upper surface of the locking portion 162 and the inner peripheral surface of the fastening band 130.

  The tension adjusting means 166 includes a holding member 167 fixed to the fastening band 130, a gripping member 168 slidably attached to the holding member 167 in the longitudinal direction of the fastening band 130, the holding member 167 and the gripping member It comprises a coil spring (not shown) for connecting the member 168.

  The pulse wave measuring device having the above structure is attached to the living body according to the following procedure. First, the sensor unit 140 is positioned on the wrist 151 so that the pressure-sensitive part is located immediately above the radial artery 153, and the fastening band 130 is wound around the wrist 151 of the subject while maintaining this state. At this time, instead of holding the tightening band 130 itself, the gripping member 168 of the tension adjusting means 166 is held, and the tightening band 130 is held outwardly along the longitudinal direction of the tightening band 130 while the tightening band 130 is held on the wrist. 151 is wound around. Then, the locking portion 162 and the fastening band 130 are fixed by a fixing means (not shown).

  In this way, by attaching using the tension adjusting means 166, the fastening band 130 can be wound around the wrist 151 with a tension within a predetermined range. This is because pulling the gripping member 168 along the longitudinal direction of the tightening band 130 causes a tension within a predetermined range to act on the other end of the tightening band 130 via the holding member 167 along with the elastic deformation of the coil spring. is there. Therefore, by adopting the above structure, it is possible to always reproduce the state in which the sensor unit is pressed and biased to the wrist with an appropriate pressing force.

On the other hand, as a pulse wave measuring device capable of mounting the sensor unit at an appropriate position with respect to the wrist, for example, Japanese Utility Model Laid-Open No. 3-67605 (Patent Document 2) and Japanese Patent Laid-Open No. 5-261704 (Patent Document). 3), and a pulse wave measuring device disclosed in Japanese Patent Laid-Open No. 11-33007 (Patent Document 4). The pulse wave measuring devices disclosed in these publications are provided with a fixing device for fixing the posture of the wrist, and the posture of the wrist of the subject is fixed using the fixing device and the sensor unit is mounted. ing. By using this fixing device, since the posture of the wrist is stabilized, the sensor unit can be mounted more directly on the artery.
Japanese Patent Laid-Open No. 3-146027 Japanese Utility Model Publication No. 3-67605 Japanese Patent Laid-Open No. 5-2611074 JP-A-11-33007

  However, in the pulse wave measuring device disclosed in Patent Document 1, the operation of winding the tightening band around the wrist in the above-described procedure is very complicated, and it is very difficult to attach correctly due to this complexity. There is a problem that there is.

  In the pulse wave measuring device disclosed in Patent Document 1, it is necessary to wind the tightening band around the entire circumference of the wrist. Also, considering that there are individual differences in the size of the wrist of the subject, the length of the tightening band needs to be long enough. For this reason, the tightening band becomes very long, and the operation of winding the one end of the long tightening band while pulling it outward along the longitudinal direction thereof is very complicated.

  In addition, in the pulse wave measuring device disclosed in Patent Document 1, it is necessary to wrap the tightening band around the wrist while holding only the gripping member of the tension adjusting means when mounting on the living body. At this time, in order to generate an appropriate tension at one end of the tightening band, it is necessary to pull the gripping member with a pulling force within a range in which the coil spring is elastically deformed. This pulling force depends on the user's effort, and if the pulling force is too weak, the tightening band is loosened or twisted, and an appropriate tightening force cannot be realized. On the other hand, when the pulling force is too strong, a strong pulling force is generated in the sensor unit, and the sensor unit is likely to be displaced from a position immediately above the artery positioned in advance. As described above, it is very difficult to manually adjust the pulling force so that an appropriate tightening force is applied to the tightening band, and this complicates the user.

  For the above reasons, it is expected that the user directly wraps around the wrist with the tightening band itself without going through the above procedure. However, when mounted by such a method, an appropriate tightening force is not realized, and it is difficult to accurately measure the pulse wave.

  In the pulse wave measuring devices disclosed in Patent Documents 2 to 4, it is difficult to wind the tightening band with an appropriate tightening force even though the sensor unit can be mounted at an appropriate position. The sensor unit cannot be urged against the living body with an appropriate pressing force.

  Therefore, the present invention has been made to solve the above-mentioned problems in a pulse wave measuring apparatus having a fixing base for fixing the posture of a wrist, and a sensor with an appropriate pressing force at an appropriate position on a living body. An object of the present invention is to provide a pulse wave measuring device capable of easily fixing a unit.

  A pulse wave measuring device according to the present invention includes a sensor unit having a pressure-sensitive portion and a biological fixture that fixes a living body, and presses the pressure-sensitive portion against the living body in a fixed state in which the biological body is fixed by the biological fixture. Thus, the pulse wave measuring device measures the pulse wave. The biological fixture includes a fixing base that fixes the posture of the living body, and a fastening band that connects the fixing base and the sensor unit, fastens the biological body, and fixes the biological body to the fixing base, and presses the sensor unit against the living body. Including. The tightening band includes a first band portion having one end attached to the sensor unit and the other end attached to the fixed base, a first band attached to the sensor unit, and the other end detachably attached to the fixed base. 2 band parts. The fixing base has a pulling means for pulling the other end of the first band part with a constant force.

  As described above, by providing the fixing base with the pulling means for pulling the other end of the first band portion of the tightening band with a constant force, the mounting operation of the pulse wave measuring device can be performed very easily. That is, no matter how the tightening band is wound around the living body after positioning the sensor unit with respect to the living body, the other end of the first band portion of the tightening band is always pulled with a constant pulling force by the pulling means. A proper tightening force is always realized by the tightening band. For this reason, it is possible to easily mount the sensor unit in a state where the sensor unit is pressed and biased to an appropriate position on the living body with an appropriate pressing force, and to measure pulse waves stably and accurately. Is possible. Further, since the tightening band is always pulled with a constant pulling force, the possibility that the sensor unit is displaced is reduced.

  In the pulse wave measuring apparatus according to the present invention, for example, in a state where the other end of the second band portion is attached to the fixed base, the fixing means for fixing the first band portion to the fixed base so as not to be relatively movable. Is preferably further provided.

  As described above, the first band portion is fixed so as not to be relatively movable with respect to the fixed base while the other end of the second band portion is attached to the fixed base. Since the adhesion with the measurement site is improved, even if the subject moves the measurement site, the tightening band does not become loose. As a result, the sensor unit will not be displaced, and the pulse wave can be measured more stably and accurately.

  In the above-described pulse wave measuring apparatus according to the present invention, for example, the fixing means includes the surface fasteners provided in the first band part and the second band part, and the first band part and the second band part are connected to the first band part and the second band part. It is preferable that the first band portion is fixed so as not to move relative to the fixed base by being locked by the surface fastener.

  In this way, since the first band part and the second band part are directly fixed, the entire circumference of the living body including the measurement site is tightened by the tightening band, so that the tightening band and the subject's measurement site are in close contact with each other. This improves the performance and makes it difficult to loosen the fastening band. Thereby, it becomes possible to measure a pulse wave stably and accurately. In addition, by using the hook-and-loop fastener, it is possible to freely adjust the mounting position of the second band portion with respect to the fixed base, so that the adhesiveness is further improved and the handleability is excellent.

  In the pulse wave measuring apparatus according to the present invention, the one end side of the first band portion is the other end of the second band portion in the engaging portion of the first band portion and the second band portion by the surface fastener. Preferably, the other end side of the first band portion is locked to the one end side of the second band portion.

  By configuring in this way, when releasing the locking of the first band part and the second band part, that is, when grasping the second band part and peeling the second band part from the first band part Since the first band portion does not move with the movement of the second band portion, the second band portion is smoothly peeled off from the first band portion. As a result, the handleability is improved.

  In the pulse wave measuring apparatus according to the present invention, for example, the fixing means includes a brake member, and the brake member is interlocked with the attachment of the second band portion to the fixing base, and the second band portion is It is preferable that the brake member abuts on the first band part by being attached to the fixed base, and the first band part is pressed and fixed so as not to move relative to the fixed base.

  As described above, the sensor unit is mounted by being configured so that the first band portion is pressed and fixed to the fixed base so as not to be relatively movable by the brake member in conjunction with the fixing of the second band portion to the fixed base. In the state, it becomes difficult for the tightening band to be loosened, and the pulse wave can be stably and accurately measured.

  In the pulse wave measuring apparatus according to the present invention, for example, the pulling means is accommodated inside the fixed base, and the first band portion is positioned outside the fixed base and the accommodating portion positioned inside the fixed base. In a non-fixed state in which the living body is not fixed by the biological fixing tool, the first band portion can be moved relative to the fixed base by the guide means provided inside the fixed base. It is preferable to be guided.

  Thus, by arranging the pulling means inside the fixed base, the apparatus can be miniaturized. Further, by arranging the pulling means inside the fixed base, a part of the first band part is positioned inside the fixed base. The guide part in which the accommodating part of the first band part is provided inside the fixed base is provided. By being configured to be guided by the means, the tightening band can be smoothly pulled out and retracted, and the operability is improved.

  In the pulse wave measuring apparatus according to the present invention, for example, it is preferable that the guiding means is constituted by a rotating roller provided at a sliding portion between the fixed base and the first band portion.

  Thus, by constituting the guide means with the rotating rollers, further smooth pull-out and pull-in of the tightening band can be realized, and the operability is greatly improved.

  The pulse wave measuring device according to the present invention preferably further includes band length adjusting means for adjusting the length of the non-accommodating portion of the first band portion.

  By configuring in this way, the length of the non-accommodating portion of the first band portion located outside the fixed base can be set to an appropriate length according to the size of the measurement site of the subject. The unit can be mounted at an appropriate position.

  In the pulse wave measuring apparatus according to the present invention, for example, the band length adjusting means is preferably provided in a non-accommodating portion of the first band portion.

  Thus, by providing the band length adjusting means for adjusting the length of the tightening band in the non-accommodating portion of the first band portion, it is possible to easily adjust the length of the non-accommodating portion of the first band portion. become. For this reason, convenience is greatly improved.

  In the pulse wave measuring apparatus according to the present invention, for example, the band length adjusting means is preferably provided on a fixed base.

  Thus, by providing the band length adjusting means for adjusting the length of the tightening band in the non-accommodating portion of the first band portion, it is possible to easily adjust the length of the non-accommodating portion of the first band portion. become. For this reason, the convenience is greatly improved and the size of the apparatus can be reduced.

  In the pulse wave measuring apparatus according to the present invention, for example, the band length adjusting means further includes band length maintaining means for maintaining the adjusted length of the non-accommodating portion of the first band portion constant. It is preferable.

  By providing the band length maintaining means in this way, it is possible to adjust only when the band length of the non-accommodating portion of the first band portion is intended. As a result, in the mounted state of the sensor unit, the tightening band does not sag due to the unintentional adjustment of the length of the non-accommodating portion of the first band portion by the band length adjusting means, so that the pulse wave can be stably and accurately detected. It becomes possible to measure.

  In the pulse wave measuring device according to the present invention, for example, the band length adjusting means comprises a rotating member configured such that one end is pivotally supported and the other end is freely rotatable, The first band portion is slidably engaged with a fixed shaft and a movable shaft provided at one end and the other end of the rotating member, respectively, and the first band portion is rotated by rotating the rotating member. It is preferable that the length of the non-accommodating portion is adjusted.

  As a configuration example in which the band length adjusting means is provided inside the fixed base, a configuration using the above-described rotating member is conceivable. With this configuration, it is possible to adjust the band length of the first band portion located outside the fixed base according to the size of the measurement site of the subject by rotating the rotating member by a predetermined amount. become.

  In the pulse wave measuring apparatus according to the present invention, for example, the pulling means is preferably a constant load spring.

  Thus, by using a constant load spring as the pulling means, it is possible to always generate a constant pulling force at the other end of the first band portion with a relatively simple configuration.

  According to the present invention, the sensor unit can be easily fixed at an appropriate position on the living body with an appropriate pressing force. As a result, it is possible to stably and accurately measure the pulse wave and to improve the convenience for the user.

  Embodiments of the present invention will be described below with reference to the drawings. In the embodiment described below, a pulse wave measuring device that employs a wrist as a measurement site for measuring a subject's pulse wave will be described as an example.

(Embodiment 1)
FIG. 1 is a schematic perspective view showing the entire structure of a pulse wave measuring apparatus according to Embodiment 1 of the present invention. FIG. 2 is a schematic longitudinal sectional view of the pulse wave measuring device shown in FIG.

  As shown in FIGS. 1 and 2, the pulse wave measuring device according to the present embodiment includes a sensor unit 40, a fixing base 10 as a biological fixture, and tightening bands 31 and 32. As shown in FIG. 2, the fixing base 10 and the sensor unit 40 are connected by fastening bands 31 and 32. The fastening band includes a first band portion 31 having one end attached to the sensor unit 40 and the other end attached to the fixed base 10, and one end attached to the sensor unit 40 and the other end detachably attached to the fixed base 10. The second band portion 32 is attached to each other, and each band has moderate flexibility.

  As shown in FIG. 1, the fixed base 10 includes a resin housing 11 having a concave portion 11a on the upper surface, and is used by being installed on a horizontal base such as a desk when used. The concave portion 11a has a shape in which an arm between the elbow and the wrist can be placed, and the posture of the wrist, which is the measurement site, is fixed when the subject places the arm on the concave portion 11a during measurement. Become.

  Operation buttons and output terminals are provided on the front surface of the fixed base 10. Here, the output terminal is a terminal for transmitting pulse wave data detected by the pulse wave measuring device to an arithmetic processing terminal such as an external PC (Personal Computer).

  As shown in FIG. 2, an opening 13 is provided on one of the side surfaces of the fixed base 10. A first band portion 31 is drawn out from the opening 13. In addition, an opening 12 is formed on the other side surface of the fixing base 10, and the first band portion 31 of the first band portion 31 is inserted through the opening 12 in an unfixed state (a state where the wrist is not fixed by the biological fixture). Some are exposed. In addition, the surface fastener 14 (refer FIG. 1) is affixed to the predetermined area | region of the side surface adjacent to the opening 12 of the fixed base 10, and also it is wound up by the tension | pulling means mentioned later among the 1st band parts 31. FIG. The surface fastener 31a is also affixed to the surface of the portion exposed from the opening 12 in the most drawn state from the above state.

  Inside the housing 11 of the fixed base 10, a constant load spring 15 that is a pulling means is disposed. Here, the constant load spring is formed by winding a long leaf spring 17 bent at a constant curvature around a shaft 16, and when the tip of the leaf spring 17 is stretched linearly. This is a spring in which the return force that is generated is constant regardless of the length with which it is pulled out.

  The other end of the first band portion 31 inserted through the opening 13 is fixed to the tip of the leaf spring 17. Accordingly, the other end of the first band portion 31 is always pulled with a constant tensile force by the constant load spring 15 in a state where the first band portion 31 is pulled.

  The first band portion 31 is divided into an accommodating portion 31 b located inside the fixed base 10 and a non-accommodating portion 31 c located outside the fixed base 10. Inside the fixed base 10, a plurality of rotating rollers 18 are provided as guide means for guiding the accommodating portion 31 b of the first band portion 31. The rotating roller 18 realizes smooth pulling and pulling of the first band portion 31 from the fixed base 10.

  As shown in FIG. 1, the sensor unit 40 includes a case body 41 having a pressure-sensitive portion 46 (see FIG. 2) and a base body 42 that supports the case body 41. The case body 41 is configured to be slidable on the rail provided on the base body 42 in the longitudinal direction of the fastening bands 31 and 32. That is, the case body 41 freely slides between a position (standby position) where the opening 43 provided in the base body 42 is closed and a position (storage position) where the opening is not closed. In addition, in FIG. 1, the state which has the case body 41 in a storage position is shown in figure. When the case body 41 is slid, it is performed by moving the case body 41 while pressing the locking release button 45 provided on the side surface of the case body 41.

  The opening 43 is a hole provided so that the pressure-sensitive part 46 disposed inside the case body 41 can be pressed against the wrist that is the measurement site, and the pressure-sensitive part is interposed through the opening 43. When 46 is lowered, the pressure-sensitive part 46 is pressed against the wrist and the pulse wave can be measured. A display unit 44 is provided on the upper surface of the sensor unit 40 to display whether or not the position of the pressure sensitive unit 46 is in an appropriate position during measurement.

  As described above, the first band portion 31 and the second band portion 32 that are tightening bands are provided at predetermined positions of the base body 42 that are located across the opening 43 provided in the base body 42 of the sensor unit 40. Installed. A hook-and-loop fastener 32a (see FIG. 2) is affixed to the inner peripheral surface side of the tip of the other end of the second band portion 32.

  3 and 4 are schematic longitudinal sectional views showing a procedure for mounting the pulse wave measuring device according to the present embodiment. FIG. 5 is a partial side view showing the structure of the fixing means of the pulse wave measuring device according to the present embodiment. Furthermore, FIG. 6 is a schematic perspective view showing a state in which a subject wears the pulse wave measurement device according to the present embodiment.

  In the following, with reference to FIG. 3 to FIG. 6, the mounting procedure of the pulse wave measuring device according to the present embodiment and the structure after mounting will be described.

  First, an arm from the elbow to the wrist is placed on the recess 11 a provided on the upper surface of the housing 11 of the fixed base 10. At this time, as shown in FIG. 3, attention is paid so that the wrist 51 of the subject is arranged at a position corresponding to the first band portion 31 of the fastening band pulled out from the fixed base 10. As a result, the posture of the wrist 51 of the subject is stably fixed by the fixing base 10.

  Next, the first band part 31 is pulled out from the fixed base 10 by a predetermined amount, and the sensor unit 40 is arranged so that the sensor unit 40 is positioned immediately above the wrist 51 of the subject. At this time, the position of the radial artery 53 is confirmed in advance by palpation or the like, and the sensor unit 40 is positioned and arranged so that the center position of the opening 43 of the base body 42 is approximately on the radial artery 53.

  Here, since the other end of the first band portion 31 is fixed to one end of the constant load spring 15 disposed inside the fixed base 10, the first band portion 31 is attached to the other end of the first band portion 31. A constant pulling force is generated by pulling out from the fixed base 10. Therefore, by releasing the grip of the first band part 31, the surplus part of the first band part 31 is drawn into the fixed base 10 by the constant load spring 15, and the wrist 51 and the fixed part are not loosened without the first band part 31 slackening. Fits to the housing 11 of the base 10. When releasing the grip of the first band portion 31, it is necessary to hold the sensor unit 40 lightly on the wrist 51 so as not to cause a positional shift in the sensor unit 40 that is previously positioned and arranged. It is.

  Next, as shown in FIG. 4, the second band portion 32 is attached to the side surface of the fixing base 10 opposite to the side surface from which the first band portion 31 is drawn. Here, for attaching the second band portion 32 and the fixing base 10, the surface fastener 14 attached to the side surface of the fixing base 10 and the tip end inner peripheral surface side of the other end of the second band portion 32 were attached. A surface fastener 32a is used. By locking these surface fasteners 14 and 32a, the second band portion 32 and the fixing base 10 are attached.

  At this time, in the pulse wave measuring device according to the present embodiment, as shown in FIG. 5, the hook and loop fastener 32 a stuck to the second band portion 32 and the hook and loop fastener 31 a stuck to the first band portion 31. Is configured to be locked through an opening 12 provided on a side surface of the fixed base 10. That is, the hook and loop fastener 32 a attached to the second band portion 32 is locked to both the hook and loop fastener 14 attached to the fixing base 10 and the hook and loop fastener 31 a attached to the first band portion 31. . Thereby, in the fixed state where the other end of the second band portion 32 is attached to the fixed base 10, the first band portion 31 is fixed to the fixed base via the second band portion 32 by the surface fasteners 31 a and 32 a as the fixing means 33. 10 is fixed so as not to be relatively movable.

  In this way, since the first band portion 31 and the second band portion 32 are directly fixed, the entire circumference of the wrist 51 is tightened by the tightening bands 31, 32, so that the tightening bands 31, 32 and the wrist 51 are Adhesion is improved, and the tightening bands 31 and 32 are less likely to loosen. Further, by using the hook-and-loop fasteners 31a and 32a as the fixing means, the mounting position of the second band portion 32 with respect to the fixing base 10 can be freely adjusted, so that convenience is greatly improved.

  Through the above procedure, a mounting state as shown in FIG. 6 is realized.

  By using the pulse wave measuring device having the above-described configuration, the fastening bands 31 and 32 can be attached to the wrist 51 with an appropriate tightening force when attached. For this reason, it becomes possible to mount the sensor unit 40 in a state in which the sensor unit 40 is pressed against the wrist 51 with an appropriate pressing force. At the same time, since the fastening bands 31 and 32 can be fastened to the wrist 51 while the posture of the wrist 51 is stably fixed by the fixing base 10, the sensor unit 40 is mounted at an appropriate position of the wrist 51. It becomes possible.

  In addition, since the work of attaching the sensor unit 40 is facilitated as compared with the conventional case, it is possible to more easily attach the sensor unit 40 to the wrist 51 more accurately. Furthermore, since the tightening bands 31 and 32 are less likely to loosen when the sensor unit 40 is attached, the sensor unit 40 is less likely to be displaced, and the pulse wave can be measured stably and accurately.

  FIG. 7 is a schematic longitudinal cross-sectional view of the pulse wave measuring device before the measurement operation for actually measuring the pulse wave. When actually measuring the pulse wave, as shown in FIG. 7, the case body 41 of the sensor unit 40 is slid and placed at a position (standby position) that closes the opening 43 of the base body 42. Then, by operating a pressing means (for example, an air bag or the like) disposed at the upper part of the pressure-sensitive part 46, the pressure-sensitive part 46 is lowered toward the wrist 51 through the opening 43 and pressed against the wrist 51. To do. Thereby, the pulse wave can be measured by the pressure sensing means provided in the pressure sensing unit 46.

(Embodiment 2)
FIG. 8 is a schematic longitudinal sectional view showing a mounting state of the pulse wave measurement device according to the second embodiment of the present invention. The pulse wave measurement device according to the present embodiment is different from the pulse wave measurement device according to the first embodiment described above in the layout of the accommodating portion of the first band portion accommodated inside the fixed base. In addition, in the same part as the above-mentioned Embodiment 1, the same code | symbol is attached | subjected in a figure, and the description is not repeated here.

  As shown in FIG. 8, the pulse wave measuring device according to the present embodiment is provided with a constant load spring 15 as a tension means inside the housing 11 of the fixed base 10, similarly to the pulse wave measuring device according to the first embodiment. The other end side of the first band portion 31 is fixed to the tip of the leaf spring 17 of the constant load spring 15. Here, the tip of the leaf spring 17 is pulled out from the upper part of the constant load spring 15, unlike the pulse wave measuring device in the first embodiment. The first band portion 31 fixed to the tip of the leaf spring 17 passes through the opening 12 provided on the side surface of the housing 11 and passes through the opening 13 provided on the opposite side surface of the housing 11. 10 Pulled out.

  For this reason, unlike the pulse wave measuring apparatus shown in the first embodiment, the exposed portion of the first band portion 31 exposed from the opening 12 of the housing 11 is the other end whose upper side is fixed to the constant load spring 15. The lower side is one end side fixed to the sensor unit 40. That is, in the pulse wave measuring device shown in the first embodiment, the exposed portion of the first band portion 31 exposed through the opening 12 is inverted in the vertical direction.

  By comprising in this way, in the fixed state (state which fixed the wrist with the biological fixture) with which the 1st band part 31 and the 2nd band part 32 were latched by the hook-and-loop fastener, the 1st band part 31 and The locking portion with the second band portion 32 is such that one end side (sensor unit 40 side) of the first band portion 31 is locked to the other end side (free end side) of the second band portion 32, and the first band The other end side (constant load spring side 15) of the portion 31 is locked to one end side (sensor unit 40 side) of the second band portion 32.

  With the above configuration, as shown in FIG. 8, when the second band portion 32 is pulled and gripped on the free end side of the second band portion 32 in order to peel off the second band portion 32 from the first band portion 31, The force F applied to the free end side of the two band portions 32 and the force F ′ applied to the first band portion 31 via the second band portion 32 and the sensor unit 40 are opposite to each other at the engaging portions by the surface fasteners 31a and 32a. Therefore, even if the free end side of the second band portion 32 is pulled, the leaf spring 17 is not further pulled out from the constant load spring 15. For this reason, it becomes possible to peel off the 2nd band part 32 from the 1st band part 31 smoothly, and it becomes possible to set it as the pulse wave measuring apparatus excellent in the handleability.

  In the case of the above configuration, as shown in FIG. 8, the constant load spring 15 itself is used as a guide means for guiding the first band portion 31 relative to the fixed base 10 in a non-fixed state. It is possible. In this case, since the rotation direction of the leaf spring 17 when the constant load spring 15 is pulled out and the direction in which the accommodating portion 31b of the first band portion 31 is pulled out are in the forward direction, a large friction is generated between them. There is no.

(Embodiment 3)
FIG. 9 is a schematic longitudinal sectional view of a pulse wave measurement device according to Embodiment 3 of the present invention. Unlike the above-described first and second embodiments, the pulse wave measuring device in the present embodiment is configured such that the first band portion is relative to the fixed base in a state where the other end of the second band portion is attached to the fixed base. It is a pulse wave measuring device that employs a brake member as a fixing means for immovably fixing. In addition, the same code | symbol is attached | subjected in the figure about the part similar to the above-mentioned Embodiment 1 or 2, and the description is not repeated here.

  As shown in FIG. 9, the pulse wave measurement device according to the present embodiment has a buckle 35 at the other end of the second band portion 32. The buckle 35 is made of, for example, a metal member, and is detachably formed on a receiving portion 11 b provided on the side surface of the housing 11 of the fixed base 10. A brake member 19 is slidably disposed inside the receiving portion 11 b of the fixed base 10. The brake member 19 has a high friction part 19 a made of rubber on the surface facing the first band part 31. The brake member 19 is urged toward the outside of the housing 11 by a spring (not shown). In the pulse wave measurement device according to the present embodiment, unlike the first embodiment described above, the surface fastener is not affixed to any of the first band part 31, the second band part 32, and the fixing base 10.

  FIG. 10A is an enlarged cross-sectional view of the attachment portion before the second band portion is attached to the fixed base, and FIG. 10B is an enlarged view of the attachment portion in a state where the second band portion is attached to the fixed base. It is sectional drawing.

  As shown in FIG. 10A, the brake member 19 is not shown in a state where the second band portion 32 is not attached to the fixed base 10, that is, in a non-fixed state where the buckle 35 is not inserted into the receiving portion 11b. The spring is biased toward the outside of the housing 11. For this reason, the brake member 19 and the first band portion 31 are not in direct contact with each other, and the first band portion 31 is slidably supported inside the fixed base 10 by the rotating rollers 18 serving as guide means.

  As shown in FIG. 10B, in the fixed state in which the buckle 35 is inserted into the receiving portion 11b in the direction of arrow A in the drawing, the buckle 35 and the brake member 19 are in direct contact with each other, so that the brake member 19 is It slides in the direction of arrow B in the figure against an urging force by a spring (not shown) and comes into contact with the first band portion 31. As a result, the first band portion 31 is sandwiched between the rotary roller 18 and the brake member 19. At this time, since the high friction portion 19 a of the brake member 19 contacts the first band portion 31, the first band portion 31 is fixed so as not to move relative to the fixed base 10. That is, in a state where the other end of the second band portion 32 is attached to the fixed base 10, the first band portion 31 is fixed so as not to move relative to the fixed base 10 by the brake member 19 and the buckle 35 as the fixing means 33. Will be.

  With the above configuration, the first band portion 31 is pressed and fixed to the fixed base 10 so as not to move relative to the fixed base 10 by the brake member 19 in conjunction with the fixing of the second band portion 32 to the fixed base 10. Therefore, it is difficult for the tightening bands 31 and 32 to be loosened when the sensor unit 40 is mounted, and the pulse wave can be measured stably and accurately.

(Embodiment 4)
FIG. 11 is a schematic longitudinal sectional view showing a non-wearing state of the pulse wave measurement device according to Embodiment 4 of the present invention. The pulse wave measuring device in the present embodiment is obtained by further providing band length adjusting means to the pulse wave measuring device in the first embodiment described above. The band length adjusting means is a means for properly correcting the length of the tightening band for the difference in the wrist size of the subject and the difference in the radial artery position between the left wrist and the right wrist. By adjusting the length of the non-accommodating portion of the first band portion drawn out from the base, the sensor unit is adjusted so that an appropriate tightening force is applied to the tightening band in the mounted state of the sensor unit, and the sensor unit with respect to the wrist is adjusted. It is a means to make mounting easier.

  As shown in FIG. 11, in the pulse wave measuring device according to the present embodiment, the band length adjusting means is provided in the non-accommodating portion 31 c of the first band portion 31. The band length adjusting means shown in the figure is generally called an adjuster, and the non-accommodating portion 31 of the first band portion 31 is divided into a sensor unit-side non-accommodating portion 31c1 and a fixed base-side non-accommodating portion 31c2. These end portions are connected by a connecting body 36 made of a resin member.

  Specifically, in this adjuster, one end of the coupling body 36 is fixed to the end of the sensor unit side non-accommodating portion 31c1 of the first band section 31, and the first band section 31 is fixed to the other end of the coupling body 36. It is comprised by winding and attaching the base side non-accommodating part 31c2. Since the fixed base side non-accommodating portion 31c2 attached to the other end side of the coupling body 36 is folded back so that the bands come into close contact with each other, the length thereof is maintained after adjustment by the friction.

  If this adjuster is used, the length of the fixed base side non-accommodating portion 31c2 of the first band portion 31 can be freely adjusted. Therefore, the sensor unit is positioned at the optimum position of the wrist by a simple operation. This makes it possible to provide a pulse wave measuring device with excellent handling properties.

(Embodiment 5)
FIG. 12 is an exploded perspective view showing the structure of the fixed base of the pulse wave measuring device according to Embodiment 3 of the present invention. FIGS. 13 and 14 are schematic longitudinal sectional views of the pulse wave measuring device according to the present embodiment, FIG. 13 is a diagram in the case where the wrist of the left arm is applied as the measurement site, and FIG. It is a figure at the time of applying the wrist of a right arm as a to-be-measured site | part. In addition, the same code | symbol is attached | subjected in the figure about the part similar to the above-mentioned Embodiment 1 thru | or 4, and the description is not repeated here.

  The pulse wave measuring device in the present embodiment is obtained by further providing band length adjusting means to the pulse wave measuring device in the first embodiment described above. The band length adjusting means is a means for properly correcting the length of the tightening band for the difference in the wrist size of the subject and the difference in the radial artery position between the left wrist and the right wrist. By adjusting the length of the non-accommodating portion of the first band portion drawn out from the base, the sensor unit is adjusted so that an appropriate tightening force is applied to the tightening band in the mounted state of the sensor unit, and the sensor unit with respect to the wrist It is a means to make mounting easier.

  As shown in FIG. 12, in the pulse wave measuring apparatus according to the present embodiment, an opening 11c is provided on the upper surface of the housing 11 of the fixed base 10, and a band is formed inside the fixed base 10 through the opening 11c. A band length adjusting mechanism 20 that is a length adjusting means is fitted. That is, unlike the pulse wave measuring apparatus in the fourth embodiment, the band length adjusting means is provided on the fixed base 10 in the pulse wave measuring apparatus in the present embodiment. The opening 11c provided on the upper surface of the fixed base 10 is covered with a lid 11d.

  The band length adjusting mechanism 20 mainly includes a casing 21 and a turning lever 22 that is a turning member that is rotatably attached to the casing 21. The rotating lever 22 is supported by the casing 21 by a fixed shaft 24 so that one end thereof cannot move, and is attached by a moving shaft 25 so that the other end can freely rotate (see FIG. 13). The moving shaft 25 is guided by a slit 26 provided in the casing 21 and can move in the horizontal direction.

  A constant load spring 15 is disposed inside the band length adjustment mechanism 20, and the other end of the first band portion 31 is fixed to one end of the constant load spring 15. The first band portion 31 is guided by a plurality of rotating rollers 18 as guide means so that a part of the first band portion 31 is exposed to the outside through an opening 23 provided on the side surface of the casing 21. Further, the first band portion 31 is slidably engaged with a fixed shaft 24 and a moving shaft 25 that rotatably attach the rotating lever 22 to the casing 21, and a side surface provided with the opening 23. It is pulled out of the casing 21 from the opposite side surface.

  In the pulse wave measuring apparatus having the above-described configuration, the length of the non-contained portion 31c of the first band portion 31 required when the wrist of the subject's left arm is applied as the measurement site as shown in FIG. Thus, the difference from the length of the non-accommodating portion 31c of the first band portion 31 required when the wrist of the right arm of the subject is applied as the measurement site is accommodated in the fixed base 10 by operating the rotating lever 22. It is absorbed by the accommodating portion 31b of the first band portion 31 thus made. For this reason, by setting it as the pulse wave measuring apparatus of the said structure, the length of the non-accommodating part 31c of the 1st band part 31 comes to be adjusted appropriately by rotating the rotation lever 22. FIG. As a result, the sensor unit can be easily attached.

  If the band length adjusting mechanism 20 is not provided, the stroke at which the constant load spring 15 can be pulled out is restricted by the width of the housing 11 of the fixed base 10. For this reason, there is a possibility that the tightening force may not be adequately optimized depending on the size of the wrist of the subject and the selection of whether to apply the wrist of the right arm or the wrist of the left arm as the measurement site. In such a case, if the tightening force is to be optimized properly, the width of the fixing base 10 needs to be increased in order to ensure a sufficiently long stroke for pulling out the constant load spring 15. It will increase in size. However, if the pulse wave measuring device having the above-described configuration is used, the length of the non-accommodating portion 31c of the first band portion 31 can be freely adjusted without being affected by the pull-out amount of the constant load spring 15, which greatly improves convenience. And contributes to the downsizing of the apparatus.

  In the pulse wave measuring apparatus having the above-described configuration, the casing 21 and the lid 11d are employed as band length maintaining means for maintaining the adjusted length of the non-accommodating portion 31c of the first band portion 31. That is, the rotation lever 22 is sandwiched and fixed between the casing 21 and the lower end portion of the lid 11d, thereby preventing unintentional rotation of the rotation lever 22 by pulling out the first band portion 31. . Thereby, it becomes possible to adjust the length of the non-accommodating portion 31c of the first band portion 31 in two states, the state shown in FIG. 13 and the state shown in FIG. It becomes possible to be a measuring device.

  In the first to fifth embodiments described above, the tightening band is composed of two bands formed separately from the first band portion and the second band portion (in the fourth embodiment, the non-accommodating portion of the first band portion). The sensor unit side non-contained part and the fixed base side non-contained part are divided into two parts, and these are connected by a connecting body, so that the total number of separate bands is three). The case has been described as an example, but the present invention is not particularly limited to such a configuration. For example, the tightening band may be constituted by a single band, and the sensor unit may be slidably attached to this band. In this case, the first band part and the second band part respectively indicate a part of one band.

  Further, in the first to fifth embodiments described above, the case where a constant load spring made of a spiral spring is employed as the pulling means has been described as an example. However, the present invention is not particularly limited to this, and a constant force is used. Any device that can pull the other end of the first band portion may be used.

  Moreover, it is good also as a pulse wave measuring apparatus provided with both the band length adjustment means shown in the above-mentioned Embodiment 4, and the band length adjustment means shown in the above-mentioned Embodiment 5. In this case, the band length adjusting means shown in the fifth embodiment is mainly used for switching the right hand or the left hand, and the band length adjusting means shown in the fourth embodiment is used for fine adjustment. preferable.

  In the above-described fifth embodiment, the case where the band length can be adjusted to the two lengths of the state shown in FIG. 13 and the state shown in FIG. 14 is exemplified. It is not particularly limited to this, and it is more preferable that the band length is adjusted in several steps in accordance with the amount of movement of the rotating lever.

  Furthermore, in the above-described first to fifth embodiments, the pulse wave measuring device adopting the wrist as the measurement site has been exemplified and described. However, the present invention is not limited to this, and the measurement site is not limited thereto. Of course, it is also possible to apply the present invention to a pulse wave measuring device employing an upper arm or a finger.

  Thus, the above-described embodiments disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a schematic perspective view which shows the whole structure of the pulse-wave measuring apparatus in Embodiment 1 of this invention. It is a schematic longitudinal cross-sectional view of the pulse-wave measuring apparatus in Embodiment 1 of this invention. It is a schematic longitudinal cross-sectional view for demonstrating the mounting | wearing procedure of the pulse-wave measuring apparatus in Embodiment 1 of this invention. It is a schematic longitudinal cross-sectional view for demonstrating the mounting | wearing procedure of the pulse-wave measuring apparatus in Embodiment 1 of this invention. It is a partial side view which shows the structure of the fixing means of the pulse wave measuring device in Embodiment 1 of this invention. It is a schematic perspective view which shows the mounting state of the pulse wave measuring device in Embodiment 1 of this invention. FIG. 5 is a schematic longitudinal sectional view showing a measurement operation for actually measuring a pulse wave in the pulse wave measuring apparatus according to Embodiment 1 of the present invention. It is a schematic longitudinal cross-sectional view which shows the mounting state of the pulse-wave measuring apparatus in Embodiment 2 of this invention. It is a schematic longitudinal cross-sectional view which shows the mounting state of the pulse-wave measuring apparatus in Embodiment 3 of this invention. In the pulse wave measuring apparatus according to the third embodiment of the present invention, (a) is an enlarged cross-sectional view of an attachment part before attaching the second band part to the fixing base, and (b) is an attachment part of the second band part to the fixing base. It is an expanded sectional view of the attaching part in the attached state. It is a schematic longitudinal cross-sectional view which shows the non-wearing state of the pulse-wave measuring apparatus in Embodiment 4 of this invention. It is a disassembled perspective view which shows the structure of the fixing stand of the pulse wave measuring device in Embodiment 5 of this invention. It is a schematic longitudinal cross-sectional view of the pulse wave measuring apparatus in Embodiment 5 of this invention, and is a figure at the time of applying the wrist of a left arm as a to-be-measured site | part. It is a schematic longitudinal cross-sectional view of the pulse wave measuring device in Embodiment 5 of this invention, and is a figure at the time of applying the wrist of a right arm as a to-be-measured site | part. It is a longitudinal cross-sectional view which shows an example of the attachment structure to the biological body in the conventional pulse wave measuring apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Fixing base, 11 Housing, 11a Recessed part, 11b Receiving part, 11c Opening, 11d Lid body, 12, 13 opening, 14-face fastener, 15 Constant load spring, 16 shaft, 17 Leaf spring, 18 Rotary roller, 19 Brake member, 19a High friction portion, 20 Band length adjustment mechanism, 21 Casing, 22 Rotating lever, 23 Opening, 24 Fixed shaft, 25 Moving shaft, 26 Slit, 31 First band portion, 31a Surface fastener, 31b Housing portion, 31c Non- Housing part, 31c1 Sensor unit side non-accommodating part, 31c2 Fixing base side non-accommodating part, 32 Second band part, 32a Surface fastener, 33 Fixing means, 35 Buckle, 36 Linked body, 40 Sensor unit, 41 Case body, 42 Base Body, 43 opening, 44 display part, 45 unlocking button, 46 pressure sensitive part, 50 Living body, 51 wrist, 52 radius, 53 radial artery.

Claims (13)

A sensor unit having a pressure-sensitive part; and a biological fixture for fixing the living body,
The biological fixture includes a fixing base for fixing a posture of a living body, and the fixing base and the sensor unit connected to each other, tightening the living body and fixing the living body to the fixing base, and pressing the sensor unit against the living body. Including a tightening band,
In a fixed state in which a living body is fixed by the living body fixing tool, the pulse wave measuring device measures the pulse wave by pressing the pressure-sensitive portion against the living body,
The fastening band has a first band portion having one end attached to the sensor unit and the other end attached to the fixing base, and one end attached to the sensor unit and the other end attached to and detached from the fixing base. A second band part that can be freely attached,
The fixed base has a pulse wave measuring device having a pulling means for pulling the other end of the first band part with a constant force.   2. The fixing device according to claim 1, further comprising a fixing unit configured to fix the first band part so as not to move relative to the fixing base in a state where the other end of the second band part is attached to the fixing base. Pulse wave measuring device. The fixing means includes a hook-and-loop fastener provided in the first band part and the second band part,
The pulse according to claim 2, wherein the first band part and the second band part are locked by the hook-and-loop fastener to fix the first band part so as not to move relative to the fixed base. Wave measuring device.   In the engagement portion of the first band portion and the second band portion by the surface fastener, the one end side of the first band portion is engaged with the other end side of the second band portion, and the first band The pulse wave measuring device according to claim 3, wherein the other end side of the portion is locked to the one end side of the second band portion. The fixing means comprises a brake member,
The brake member is interlocked with the attachment of the second band part to the fixed base,
The said 2nd band part is attached to the said fixed base, The said brake member contact | abuts to the said 1st band part, The said 1st band part is pressed and fixed to the said fixed base so that relative movement is impossible. 2. The pulse wave measuring device according to 2. The pulling means is accommodated inside the fixed base,
The first band part includes an accommodating part located inside the fixed base and a non-accommodating part located outside the fixed base,
In a non-fixed state in which the living body is not fixed by the biological fixing tool, the first band portion is guided by the guide means provided in the fixed base so as to be movable relative to the fixed base. The pulse wave measuring device according to any one of claims 1 to 5.   The pulse wave measuring device according to claim 6, wherein the guide means is constituted by a rotating roller provided at a sliding portion between the fixed base and the first band portion.   The pulse wave measuring device according to claim 6 or 7, further comprising a band length adjusting means for adjusting a length of the non-accommodating portion of the first band portion.   The pulse wave measurement device according to claim 8, wherein the band length adjusting means is provided in the non-accommodating portion of the first band portion.   The pulse wave measuring device according to claim 8, wherein the band length adjusting means is provided on the fixed base.   The pulse wave measuring device according to claim 10, wherein the band length adjusting means includes a band length maintaining means for maintaining a constant length of the non-accommodating portion of the adjusted first band portion. . The band length adjusting means comprises a rotating member configured such that one end is pivotally supported and the other end freely rotates,
The first band portion is slidably engaged with a fixed shaft and a moving shaft provided at the one end and the other end of the rotating member,
The pulse wave measuring device according to claim 10 or 11, wherein a length of the non-accommodating portion of the first band portion is adjusted by rotating the rotating member.   The pulse wave measuring device according to any one of claims 1 to 12, wherein the pulling means is a constant load spring.

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